Re: [JBoss-user] Starting threads from session beans

[Simone M. <mi...@ho...>]

You can then invoke your MBean method from the EJB:

Object result =  mbeanServer.invoke(objectName, methodName,
    params, signature);

And that should not break the rules.

Simone
----- Original Message ----- 
From: "Alex Sumner" <ale...@bu...>
To: <jbo...@li...>
Sent: Friday, March 28, 2003 12:33 PM
Subject: RE: [JBoss-user] Starting threads from session beans


> I can use an MBean, in that I can put my multi-threaded code that does
> the background work into an MBean easily enough. In fact, that's what I
> was planning to do.
> 
> But how do I then, from within an EJB method, tell it to do something
> without breaking the rules? I'm thinking maybe I have to make my MBean a
> JCA resource?
> 
> -----Original Message-----
> From: jbo...@li...
> [mailto:jbo...@li...] On Behalf Of Simone
> Milani
> Sent: 28 March 2003 11:37
> To: jbo...@li...
> Subject: Re: [JBoss-user] Starting threads from session beans
> 
> 
> Why not use an MBean?
> 
> Simone
> ----- Original Message -----
> From: "Igor Fedorenko" <ife...@th...>
> To: <jbo...@li...>
> Sent: Friday, March 28, 2003 10:58 AM
> Subject: RE: [JBoss-user] Starting threads from session beans
> 
> 
> You can write JCA adapter and do (virtually) anything you want in it. It
> much easier than it sounds...
> 
> > -----Original Message-----
> > From: Alex Sumner [mailto:ale...@bu...]
> > Sent: Friday, March 28, 2003 4:55 AM
> > To: jbo...@li...
> > Subject: RE: [JBoss-user] Starting threads from session beans
> >
> >
> > Thanks,
> >
> > Wonder if it's permissible to enter a synchronized block? That would 
> > give me all I need, just add something to a list, then another thread
> > (pre-existing) can pick it up and do something about it. Otherwise 
> > it's MDBs and lots of messages, which is a big overhead for what I 
> > need.
> >
> > Cheers,
> >
> > Alex
> >
> > -----Original Message-----
> > From: jbo...@li...
> > [mailto:jbo...@li...] On Behalf Of Alastair 
> > Rodgers
> > Sent: 28 March 2003 09:30
> > To: jbo...@li...
> > Subject: RE: [JBoss-user] Starting threads from session beans
> >
> >
> > No, the EJB 2.0 Spec doesn't permit it. Section 24.1.2 (page 495)
> > states:
> >
> > <quote>
> > The enterprise bean must not attempt to manage threads. The enterprise
> 
> > bean must not attempt to start, stop, suspend, or resume a thread; or 
> > to change a thread's priority or name. The enterprise bean must
> > not attempt
> > to manage thread groups.
> >
> > These functions are reserved for the EJB Container. Allowing the 
> > enterprise bean to manage threads would decrease the Container's 
> > ability to properly manage the runtime environment. </quote>
> >
> >
> > Regards,
> > Al.
> >
> >
> > > -----Original Message-----
> > > From: jbo...@li...
> > > [mailto:jbo...@li...] On Behalf Of Alex 
> > > Sumner
> > > Sent: 27 March 2003 20:15
> > > To: jbo...@li...
> > > Subject: [JBoss-user] Starting threads from session beans
> > >
> > >
> > > Hi,
> > >
> > > Briefly: is it permissible to start a new thread from a thread 
> > > running in a session bean?
> > >
> > > I've heard that it isn't allowed, but can't see this explicitly 
> > > prohibited in the J2EE specs. More importantly, what will the 
> > > consequences be in JBoss? If the session bean thread is in a TX, 
> > > would I be correct in assuming the new thread will not be associated
> 
> > > with that TX?
> > >
> > > Thanks,
> > >
> > > Alex
> > >
> > >
> > >
> >
> >
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